US6778128B2 - Method of locating underground utility lines and an underground utility line - Google Patents

Method of locating underground utility lines and an underground utility line Download PDF

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Publication number
US6778128B2
US6778128B2 US10/359,446 US35944603A US6778128B2 US 6778128 B2 US6778128 B2 US 6778128B2 US 35944603 A US35944603 A US 35944603A US 6778128 B2 US6778128 B2 US 6778128B2
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Prior art keywords
utility line
underground utility
transponder signals
transponders
ordinates
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US10/359,446
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US20040140923A1 (en
Inventor
Layne Daniel Tucker
Peter William Lylick
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Echorfid LLC
TUCKER LAYNE
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Guardian Angel Protection Inc
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Assigned to GUARDIAN ANGEL PROTECTION INC. reassignment GUARDIAN ANGEL PROTECTION INC. ASSIGNMENT OF ASSIGNORS INTEREST (SEE DOCUMENT FOR DETAILS). Assignors: LYLICK, PETER WILLIAM, TUCKER, LAYNE DANIEL
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Assigned to GLOBAL PRECISION SOLUTIONS, LLP reassignment GLOBAL PRECISION SOLUTIONS, LLP ASSIGNMENT OF ASSIGNORS INTEREST (SEE DOCUMENT FOR DETAILS). Assignors: GURDIAN ANGEL PROTECTION, INC.
Assigned to KING CAT CONTRACTING LTD. reassignment KING CAT CONTRACTING LTD. ASSIGNMENT OF ASSIGNORS INTEREST (SEE DOCUMENT FOR DETAILS). Assignors: GLOBAL PRECISION SOLUTIONS, LLP
Assigned to WHITECOURT ELECTRIC LTD. reassignment WHITECOURT ELECTRIC LTD. MERGER (SEE DOCUMENT FOR DETAILS). Assignors: KING CAT CONTRACTING LTD.
Assigned to TUCKER, LAYNE reassignment TUCKER, LAYNE ASSIGNMENT OF ASSIGNORS INTEREST (SEE DOCUMENT FOR DETAILS). Assignors: WHITECOURT ELECTRIC LTD.
Assigned to TUCKER, LAYNE DANIEL reassignment TUCKER, LAYNE DANIEL ASSIGNMENT OF ASSIGNORS INTEREST (SEE DOCUMENT FOR DETAILS). Assignors: WHITECOURT ELECTRIC LTD.
Assigned to ECHORFID, LLC reassignment ECHORFID, LLC ASSIGNMENT OF ASSIGNORS INTEREST (SEE DOCUMENT FOR DETAILS). Assignors: TUCKER, LAYNE DANIEL
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    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01V—GEOPHYSICS; GRAVITATIONAL MEASUREMENTS; DETECTING MASSES OR OBJECTS; TAGS
    • G01V15/00—Tags attached to, or associated with, an object, in order to enable detection of the object
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01S—RADIO DIRECTION-FINDING; RADIO NAVIGATION; DETERMINING DISTANCE OR VELOCITY BY USE OF RADIO WAVES; LOCATING OR PRESENCE-DETECTING BY USE OF THE REFLECTION OR RERADIATION OF RADIO WAVES; ANALOGOUS ARRANGEMENTS USING OTHER WAVES
    • G01S13/00—Systems using the reflection or reradiation of radio waves, e.g. radar systems; Analogous systems using reflection or reradiation of waves whose nature or wavelength is irrelevant or unspecified
    • G01S13/88—Radar or analogous systems specially adapted for specific applications
    • G01S13/885—Radar or analogous systems specially adapted for specific applications for ground probing
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01S—RADIO DIRECTION-FINDING; RADIO NAVIGATION; DETERMINING DISTANCE OR VELOCITY BY USE OF RADIO WAVES; LOCATING OR PRESENCE-DETECTING BY USE OF THE REFLECTION OR RERADIATION OF RADIO WAVES; ANALOGOUS ARRANGEMENTS USING OTHER WAVES
    • G01S19/00—Satellite radio beacon positioning systems; Determining position, velocity or attitude using signals transmitted by such systems
    • G01S19/01—Satellite radio beacon positioning systems transmitting time-stamped messages, e.g. GPS [Global Positioning System], GLONASS [Global Orbiting Navigation Satellite System] or GALILEO
    • G01S19/13—Receivers
    • G01S19/14—Receivers specially adapted for specific applications

Definitions

  • the present invention relates to a method of locating an underground utility line and an underground utility line which has been installed in accordance with the teachings of the method.
  • U.S. Pat. No. 6,282,477 (Gudat et al 2001) describes the simultaneous display of an earthworking machine and an underground object as taken from a utility company map in a data format of the location of their buried utility.
  • the patent reference describes an inherent “region of uncertainty” caused by a number of factors. One of those factors is the fact that subsurface movement can cause utility lines to move underground from their original position.
  • U.S. Pat. No. 6,119,376 (Stump 2000) describes an excavator navigation system for monitoring an excavator as it progresses along an excavation route and detecting any deviations from the predetermined excavation route.
  • a mobile transponder on the excavator is supplemented by one or more base transponders selectively positioned along the excavation route.
  • a first step involves securing transponders along a length of an underground utility line at regular spaced intervals.
  • a second step involves interrogating the transponders to receive transponder signals.
  • a third step involves ascertaining the position of the transponder signals and extrapolating positioning of the underground utility line from the transponder signals.
  • signals from the transponders can be used to obtain an accurate indication of the positioning of the underground utility.
  • the transponder signals include vital information regarding the utility line.
  • the transponder signals can communicate whether the utility line is a water line, a natural gas line, an electrical cable or a fiberoptic cable. It can also contain detailed information about the utility line. For example, for a gas line there can be indicated the size of the line, the pressure that the gas is under and an emergency contact number.
  • an underground utility line having transponders secured along it's length at regular spaced intervals and a display displaying on a grid of GPS co-ordinates, GPS co-ordinates of transponder signals from each of the transponders, along with positioning of the underground utility line as extrapolated from the transponder signals.
  • FIG. 1 is a side elevation view, in section, of an underground utility line modified in accordance with the teachings of the present invention.
  • FIG. 2 is a top plan view of a display displaying the underground utility line in accordance with the teachings of the present invention.
  • a utility line 12 is illustrated buried in ground 14 and having transponders 16 secured along it's length at regular spaced intervals.
  • Display 18 displays a grid 20 of global positioning system (GPS) co-ordinates.
  • GPS global positioning system
  • Grid 20 also displays the actual positioning of underground utility line 12 as extrapolated by connecting GPS co-ordinates 22 .
  • transponders 16 are positioned along utility line 12 . Transponders 16 remain dormant until interrogated.
  • transponders 16 are interrogated and their GPS co-ordinates 22 are determined. GPS co-ordinates 22 are then displayed upon grid 20 . From GPS co-ordinates 22 the actual underground positioning of utility line 12 can be displayed on grid 20 .
  • the transponder signals provide vital information about utility line 12 , so that the nature of the utility line and its characteristics (size, pressure, etc.) are known, along with emergency contact information.

Abstract

A method of locating an underground utility line. A first step involves securing transponders along a length of an underground utility line at regular spaced intervals. A second step involves interrogating the transponders to receive transponder signals. A third step involves ascertaining the position of the transponder signals and extrapolating positioning of the underground utility line from the transponder signals.

Description

FIELD OF THE INVENTION
The present invention relates to a method of locating an underground utility line and an underground utility line which has been installed in accordance with the teachings of the method.
BACKGROUND OF THE INVENTION
U.S. Pat. No. 6,282,477 (Gudat et al 2001) describes the simultaneous display of an earthworking machine and an underground object as taken from a utility company map in a data format of the location of their buried utility. The patent reference describes an inherent “region of uncertainty” caused by a number of factors. One of those factors is the fact that subsurface movement can cause utility lines to move underground from their original position.
U.S. Pat. No. 6,119,376 (Stump 2000) describes an excavator navigation system for monitoring an excavator as it progresses along an excavation route and detecting any deviations from the predetermined excavation route. To increase the accuracy of the system, a mobile transponder on the excavator is supplemented by one or more base transponders selectively positioned along the excavation route.
SUMMARY OF THE INVENTION
What is required is a method of locating an underground utility line which will reduce or eliminate the “region of uncertainty”.
According to a first aspect of the present invention there is provided a method of locating an underground utility line. A first step involves securing transponders along a length of an underground utility line at regular spaced intervals. A second step involves interrogating the transponders to receive transponder signals. A third step involves ascertaining the position of the transponder signals and extrapolating positioning of the underground utility line from the transponder signals.
With the method, as described above, signals from the transponders can be used to obtain an accurate indication of the positioning of the underground utility.
Although beneficial results may be obtained through the use of the method, as described above, even more beneficial results may be obtained when the transponder signals include vital information regarding the utility line. The transponder signals can communicate whether the utility line is a water line, a natural gas line, an electrical cable or a fiberoptic cable. It can also contain detailed information about the utility line. For example, for a gas line there can be indicated the size of the line, the pressure that the gas is under and an emergency contact number.
There are various ways in which the location of transponders emitting radio frequency signals can be determined. Beneficial results have been obtained when global positioning system (GPS) co-ordinates are determined for each of the transponder signals and the transponder signals from the transponders are displayed on a grid of GPS co-ordinates.
According to a second aspect of the present invention there is provided, in combination, an underground utility line having transponders secured along it's length at regular spaced intervals and a display displaying on a grid of GPS co-ordinates, GPS co-ordinates of transponder signals from each of the transponders, along with positioning of the underground utility line as extrapolated from the transponder signals.
BRIEF DESCRIPTION OF THE DRAWINGS
These and other features of the invention will become more apparent from the following description in which reference is made to the appended drawings, the drawings are for the purpose of illustration only and are not intended to in any way limit the scope of the invention to the particular embodiment or embodiments shown, wherein:
FIG. 1 is a side elevation view, in section, of an underground utility line modified in accordance with the teachings of the present invention.
FIG. 2 is a top plan view of a display displaying the underground utility line in accordance with the teachings of the present invention.
DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENT
The preferred method of locating an underground utility line will now be described with reference to FIGS. 1 and 2.
Structure and Relationship of Parts:
Referring to FIG. 1, a utility line 12 is illustrated buried in ground 14 and having transponders 16 secured along it's length at regular spaced intervals.
Referring to FIG. 2, a display 18 is illustrated. Display 18 displays a grid 20 of global positioning system (GPS) co-ordinates. On grid 20 are positioned global positioning system (GPS) co-ordinates 22 which represent signals from each of transponders 16. Grid 20 also displays the actual positioning of underground utility line 12 as extrapolated by connecting GPS co-ordinates 22.
Operation:
Referring to FIG. 1, at the time of installation of utility line 12 into ground 14, transponders 16 are positioned along utility line 12. Transponders 16 remain dormant until interrogated.
Referring to FIG. 2, when excavation activity is to be conducted in the vicinity of utility line 12, transponders 16 are interrogated and their GPS co-ordinates 22 are determined. GPS co-ordinates 22 are then displayed upon grid 20. From GPS co-ordinates 22 the actual underground positioning of utility line 12 can be displayed on grid 20. The transponder signals provide vital information about utility line 12, so that the nature of the utility line and its characteristics (size, pressure, etc.) are known, along with emergency contact information.
The use of this method and the described combination, allows utility line 12 to be accurately displayed, notwithstanding that some underground movement may have occurred. In this way the “region of uncertainty” is reduced, if not eliminated entirely.
In this patent document, the word “comprising” is used in its non-limiting sense to mean that items following the word are included, but items not specifically mentioned are not excluded. A reference to an element by the indefinite article “a” does not exclude the possibility that more than one of the element is present, unless the context clearly requires that there be one and only one of the elements.
It will be apparent to one skilled in the art that modifications may be made to the illustrated embodiment without departing from the spirit and scope of the invention as hereinafter defined in the Claims.

Claims (3)

The embodiments of the invention in which an exclusive property or privilege is claimed are defined as follows:
1. A method of locating an underground utility line, comprising the steps of:
securing transponders along a length of an underground utility line at regular spaced intervals;
interrogating the transponders to receive transponder signals;
ascertaining the position of the transponder signals and extrapolating positioning of the underground utility line from the transponder signals;
determining global positioning system (GPS) co-ordinates for each of the transponder signals; and
displaying the transponder signals from the transponders on a grid of GPS co-ordinates.
2. The method as defined in claim 1, wherein the transponder signals include vital information regarding the utility line.
3. In combination:
an underground utility line having transponders secured along its length at regular spaced intervals; and
a display displaying on a grid of GPS co-ordinates GPS co-ordinates of transponder signals from each of the transponders, along with positioning of the underground utility line as extrapolated from the transponder signals.
US10/359,446 2003-01-17 2003-02-04 Method of locating underground utility lines and an underground utility line Expired - Lifetime US6778128B2 (en)

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CA2,416,513 2003-01-17
CA2416513 2003-01-17
CA002416513A CA2416513C (en) 2003-01-17 2003-01-17 Method of locating underground utility lines and an underground utility line

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US20070188169A1 (en) * 2004-06-30 2007-08-16 Rovert Bosch Gmbh Method and device for determining the thickness of material using high frequency
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US20080125942A1 (en) * 2006-06-30 2008-05-29 Page Tucker System and method for digging navigation
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US20090204614A1 (en) * 2008-02-12 2009-08-13 Nielsen Steven E Searchable electronic records of underground facility locate marking operations
US7640105B2 (en) 2007-03-13 2009-12-29 Certus View Technologies, LLC Marking system and method with location and/or time tracking
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